Papers by Shu Chen

42 papers
Attention-guided Self-reflection for Zero-shot Hallucination Detection in Large Language Models (2025.emnlp-main)

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Challenge: Hallucination is a significant barrier to the effective application of Large Language Models (LLMs).
Approach: They propose an Attention-Guided SElf-Reflection approach for hallucination detection in Large Language Models.
Outcome: The proposed method significantly outperforms existing methods in zero-shot hallucination detection on four widely-used LLMs across three different halluciation benchmarks.
DynamicFocalPO: Adaptive Focusing Strategy for Preference Optimization (2026.findings-acl)

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Challenge: Recent preference optimization algorithms such as Direct Preference Optimization (DPO) have become prevalent for aligning large language models with human preferences.
Approach: They propose a preference optimization algorithm that introduces a modulating factor that down-weighs misranked preference pairs and employs focusing strategy that adapts over the course of training.
Outcome: Experiments show that DynamicFocalPO surpasses both DPO and FocalPO on benchmarks including Alpaca Eval 2.0 and Arena-Hard using Mistral-Base-7B and Llama-3-Instruct-8B.
REInstruct: Building Instruction Data from Unlabeled Corpus (2024.findings-acl)

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Challenge: Existing methods for annotating instruction data are expensive and difficult to scale.
Approach: They propose a method to automatically build instruction data from an unlabeled corpus without heavy reliance on proprietary LLMs and human annotation.
Outcome: The proposed method outperforms existing methods on AlpacaEval leaderboard and other open-source methods.
Adaptive Attentional Network for Few-Shot Knowledge Graph Completion (2020.emnlp-main)

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Challenge: Recent attempts to learn static representations of entities and references ignore their dynamic properties.
Approach: They propose to learn static representations of entities and references ignoring their dynamic properties . a neighbor encoder learns entities' roles while a query-aware aggregator learns references' contributions .
Outcome: The proposed approach achieves state-of-the-art results with different few-shot sizes.
PreCo: A Large-scale Dataset in Preschool Vocabulary for Coreference Resolution (D18-1)

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Challenge: Existing methods for coreference resolution are based on word2vec-like representations of entities.
Approach: They propose a large-scale English dataset for coreference resolution . they use 38K documents and 12.5M words from English-speaking preschoolers .
Outcome: The proposed dataset is more efficient with higher training-test overlap than OntoNotes . the study also shows that mention detection and clustering are more efficient on PreCo .
DALK: Dynamic Co-Augmentation of LLMs and KG to answer Alzheimer’s Disease Questions with Scientific Literature (2024.findings-emnlp)

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Challenge: Recent advances in large language models have achieved promising performances across various applications, but the challenge of integrating long-tail knowledge continues to impede the seamless adoption of LLMs in specialized domains.
Approach: They propose a dynamic co-augmentation framework for the refinement of large language models and knowledge graphs in the context of Alzheimer's Disease.
Outcome: The proposed framework can be used to study Alzheimer's Disease (AD) using LLMs and KGs.
KELE: Residual Knowledge Erasure for Enhanced Multi-hop Reasoning in Knowledge Editing (2025.findings-emnlp)

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Challenge: Existing knowledge editing techniques show limitations when applied to multi-hop reasoning . residual single-hop knowledge causes edited models to revert to original answers .
Approach: They propose a knowledge editing method that incorporates a Knowledge Erasure mechanism for Large language model Editing (KELE) they propose an erasure function for residual knowledge and an injection function for new knowledge .
Outcome: The proposed method significantly improves multi-hop reasoning capability of edited models.
Forget the Unneeded: Backdooring Large Language Models via Contrastive-enhanced Machine Unlearning (2025.findings-emnlp)

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Challenge: Existing methods for prompt tuning for Large Language Models find backdoor attacks to be significant in data-rich scenarios.
Approach: They propose a backdoor attacks through contrastive-enhanced machine unlearning in data-limited scenarios . they use a machine un learning method to capture precise backdoor patterns .
Outcome: The proposed method captures precise backdoor patterns without association between triggers and backdoors, reducing side effects.
ℛ3: Advertisement Compliance ℛectification via Group-ℛelative Experience Extractor and Curriculum ℛeinforcement (2026.acl-industry)

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Challenge: Existing methods of content moderation are infeasible due to over-editing and compromise the advertiser’s original semantic intent.
Approach: They propose a framework to harmonize compliance with original intent preservation that integrates a data-driven framework and a curriculum to enforce compliance while maximizing semantic consistency.
Outcome: The proposed framework outperforms state-of-the-art baselines on industrial datasets and on online A/B testing on industrial video.
EX-FEVER: A Dataset for Multi-hop Explainable Fact Verification (2024.findings-acl)

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Challenge: Existing studies on fact verification lack a high-quality dataset for explainability . existing systems lack evidence retrieval and veracity prediction, limiting the ability to verify a claim .
Approach: They propose a dataset for multi-hop explainable fact verification that summarises and modifies Wikipedia documents.
Outcome: The proposed dataset aims to improve the accuracy of multi-hop explainable fact verification systems.
Taxonomy-Guided Zero-Shot Recommendations with LLMs (2025.coling-main)

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Challenge: Existing approaches to deploy large language models (LLMs) into RecSys have limited prompt length, unstructured item information, and un-constrained generation of recommendations.
Approach: They propose a taxonomy-guided recommendation framework that empowers LLMs with category information in a systematic approach.
Outcome: The proposed framework significantly improves recommendation quality compared to zero-shot approaches.
RPC-Bench: A Fine-grained Benchmark for Research Paper Comprehension (2026.acl-long)

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Challenge: Existing benchmarks for understanding research papers offer limited fine-grained evaluation at scale.
Approach: They propose a large-scale question-answering benchmark built from review–rebuttal exchanges of high-quality computer science papers.
Outcome: The proposed model is based on human-verified QA pairs and contains 15K questions.
RAVEN++: Pinpointing Fine-Grained Violations in Advertisement Videos with Active Reinforcement Reasoning (2025.emnlp-industry)

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Challenge: Recent advances in large language models have improved the detection of non-compliant content, but critical gaps persist in fine-grained understanding, explainability, and generalization.
Approach: They propose a framework that combines active reinforcement learning, fine-grained violation understanding and progressive multi-stage training.
Outcome: The proposed framework outperforms general-purpose LLMs and specialized models in fine-grained violation understanding, explainability, and generalization.
JARVIS or Ultron? A Survey on the Safety and Security Threats of Computer-Using Agents (2026.acl-long)

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Challenge: Recent advances in computer-using agents have created new safety and security risks . despite the impressive capabilities of CUAs, there are still significant security risks.
Approach: They propose a systematization of knowledge on the safety and security threats of Computer-Using Agents.
Outcome: The proposed framework provides a framework for assessing the safety and security risks of computer-using agents.
Towards an On-device Agent for Text Rewriting (2024.findings-naacl)

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Challenge: Large Language Models (LLMs) have demonstrated impressive capabilities for text rewriting, however creating a smaller yet potent language model presents two formidable challenges: costly data collection and absence of emergent capabilities.
Approach: They propose a new instruction tuning method to develop a mo-bile text rewriting model that leverages LLM-generated data and heuristic reinforcement learning, eliminating the need for human data collection.
Outcome: The proposed model surpasses the current state-of-the-art LLMs in text rewriting while maintaining a significantly reduced model size using public benchmark EditEval and our new benchmark.
ML-Promise: A Multilingual Dataset for Corporate Promise Verification (2025.emnlp-main)

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Challenge: Promises shape perceptions and drive decisions, but verification of their fulfillment is difficult due to complexity and volume of commitments . authors propose a new approach to verifying promises in environmental, social, and governance reports . complexity of promises, complexity of evidence, difficulty in verifying their fulfillment a pressing need for new approaches .
Approach: They propose a multilingual dataset that includes English, French, Chinese, Japanese, and Korean . they propose ML-Promise to facilitate in-depth verification of corporate promises .
Outcome: The proposed approach includes promise identification, evidence assessment, and evaluation of timing for verification in multiple languages.
Real-time Ad Retrieval via LLM-generative Commercial Intention for Sponsored Search Advertising (2025.emnlp-main)

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Challenge: Existing methods for retrieving documents and ads use one-to-few mappings and time-consuming content extraction.
Approach: They propose a framework that leverages LLM-generated commercial intents as an intermediate semantic representation to directly retrieve ads for queries in real-time.
Outcome: The proposed framework has been implemented in a real-world online system, handling daily search volumes in billions.
From Generation to Judgment: Opportunities and Challenges of LLM-as-a-judge (2025.emnlp-main)

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Challenge: Recent advances in Large Language Models (LLMs) inspire the "LLM-as-a-judge" paradigm . traditional methods of assessment and evaluation fail in dynamic and open-ended scenarios .
Approach: They propose a paradigm where LLMs are leveraged to perform scoring, ranking, or selection for machine learning evaluation scenarios.
Outcome: The proposed model-based judgment and evaluation paradigms are based on large language models and are compared to the current model-driven evaluation paradigm.
MedDialog: Large-scale Medical Dialogue Datasets (2020.emnlp-main)

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Challenge: telemedicine is a medical practice that provides patient care remotely using video conferencing tools.
Approach: They build large-scale medical dialogue datasets to facilitate research . they pretrain several models on the Chinese MedDialog dataset and compare their performance .
Outcome: The proposed datasets show that models trained on MedDialog can generate doctor-like medical dialogues.
PromptDA: Label-guided Data Augmentation for Prompt-based Few Shot Learners (2023.eacl-main)

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Challenge: Existing studies on prompt-based few-shot tuning focus on deriving proper label words with a verbalizer or generating prompt templates to elicit semantics from PLMs.
Approach: They propose a framework that leverages label semantics for prompt-based tuning.
Outcome: The proposed framework improves on few-shot text classification tasks by leveraging label semantics and data augmentation.
Scaling is Not All You Need: Clinical-Oriented Reinforcement Learning Makes Parameter-Efficient Clinical Reasoning (2026.findings-acl)

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Challenge: Large language models are increasingly used in medicine, but expert-level clinical reasoning remains a high-complexity, high-stakes frontier.
Approach: They propose to train clinical reasoning models using a Reasoning-Oriented Data Strategy based on topological synthesis and CoT cold-start.
Outcome: The proposed pipeline outperforms existing models and outperformed the strongest open-source alternatives up to 671B in MedXpertQA.
Fusion-Eval: Integrating Assistant Evaluators with LLMs (2024.emnlp-industry)

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Challenge: Recent studies have employed large language models (LLMs) as reference-free metrics for NLG evaluation, enhancing adaptability to new tasks tasks.
Approach: They propose a method that leverages large language models to integrate insights from various assistant evaluators.
Outcome: The proposed approach achieves a 0.962 system-level Kendall-Tau correlation with humans on SummEval and a 0.7444 turn-level Spearman correlation on TopicalChat, which is significantly higher than baseline methods.
Knowledge Graph Enhanced Large Language Model Editing (2024.emnlp-main)

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Challenge: Existing methods for editing large language models struggle to track and incorporate changes in knowledge associated with edits, which limits the generalization ability of post-edit LLMs in processing edited knowledge.
Approach: They propose a model editing method that leverages knowledge graphs to enhance LLM editing by capturing changes in associated knowledge by constructing an external graph.
Outcome: The proposed method improves the generalization ability of LLMs in processing edited knowledge.
Reinforcement Learning–Guided Adaptive Tuning for Out-of-Distribution Harmful Text Detection (2026.acl-long)

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Challenge: Existing methods for testing harmful information on social media rely on fixed parameters that fail to handle substantial semantic discrepancies . RLAT can be used to adapt to semantic variations while preventing overfitting from continuous tuning.
Approach: They propose a reinforcement learning-guided adaptive tuning method for harmful text detection that optimizes consistency loss and applies word-level attention constraints to reduce over-reliance on local words.
Outcome: The proposed method outperforms state-of-the-art models in cross-platform and cross-temporal scenarios across multiple public datasets.
When Safety Alignment Fails to Generalize: Probing with Language Game Jailbreaks (2026.findings-acl)

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Challenge: Existing safety alignment methods rely on fixed or narrow transformation schemes to generalize . existing methods based on fixed and narrow transformations are often inadequate .
Approach: They propose a framework for discovering and refining language game-based jailbreaks to probe alignment generalization.
Outcome: The proposed framework allows controlled exploration of alignment behavior across closely related linguistic variants.
An Efficient Conversational Smart Compose System (2023.acl-demo)

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Challenge: a cloud-based smart compose system is designed to improve human-to-human conversation efficiency.
Approach: They propose a cloud-based smart compose system to improve conversation efficiency . they propose heuristics to achieve the best trade-off between quality and latency .
Outcome: The proposed system reduces latency without losing composing quality further.
Rejection-to-Acceptance Transition: Model Editing-Based Jailbreak Backdoor Injection Not Limited to Few Output Tokens (2026.findings-acl)

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Challenge: Existing methods for jailbreaking LLMs are implemented by binding backdoors to predefined phrases as first few output tokens, inducing the LLM’s next-token prediction to produce continuous responses.
Approach: They propose a model editing-based jailbreak backdoor attack that hijacks LLM representations into a acceptance domain rather than binding to a few output tokens.
Outcome: The proposed model editing method outperforms existing methods, showing stronger jailbreak capabilities across LLMs and datasets.
Can Large Language Models Identify Authorship? (2024.findings-emnlp)

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Challenge: Large Language Models (LLMs) have demonstrated exceptional capacity for reasoning and problem-solving, but their potential in authorship analysis remains under-explored.
Approach: They propose to integrate explicit linguistic features into LLMs to provide explanations into their reasoning processes.
Outcome: The proposed models demonstrate their ability to perform zero-shot, end-to-end authorship verification effectively and provide explainability through explicit linguistic features.
On the Generation of Medical Dialogs for COVID-19 (2021.acl-short)

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Challenge: under the pandemic of COVID-19, people experiencing COVI D19-related symptoms have a pressing need to consult doctors.
Approach: They develop a medical dialog system that can provide COVID19-related consultations . they use two dialog datasets containing conversations between doctors and patients .
Outcome: The proposed system can provide COVID19-related consultations, but is too small compared with general-domain dialog datasets.
Do Vision-Language Models Have Internal World Models? Towards an Atomic Evaluation (2025.findings-acl)

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Challenge: Recent studies have evaluated and shown limitations in specific capabilities such as visual understanding, but a systematic evaluation of VLMs’ fundamental WM abilities remains absent.
Approach: They propose a framework that assesses perception and prediction to provide an atomic evaluation of VLMs as WMs.
Outcome: The proposed framework assesses perception and prediction abilities on 15 latest VLMs and compares them to human-level models.
Execution as Verification: Fine-Grained Self-Correcting Reasoning for Complex KBQA (2026.acl-long)

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Challenge: Existing knowledge base question answering methods are limited by syntactic constraints and are prone to structural deviations that render queries unexecutable.
Approach: They propose a framework that reframes semantic parsing as an iterative reasoning process driven by execution feedback.
Outcome: The proposed method achieves significant improvements in query executability and answer accuracy on the WebQSP and CWQ datasets.
From Imitation to Introspection: Probing Self-Consciousness in Language Models (2025.findings-acl)

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Challenge: Existing language models demonstrate impressive abilities in areas like natural language understanding, content creation, and reasoning.
Approach: They propose a definition of self-consciousness for language models and refine ten core concepts by leveraging structural causal games.
Outcome: The proposed definitions are based on structural causal games and ten core concepts.
SecureSQL: Evaluating Data Leakage of Large Language Models as Natural Language Interfaces to Databases (2024.findings-emnlp)

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Challenge: Existing studies on the vulnerability of large language models to SQL injection have been limited.
Approach: They propose to evaluate the potential of language models to leak sensitive data when generating SQL queries.
Outcome: The proposed model with the best performance has an accuracy of 61.7%, compared to humans who achieve 94% accuracy.
CompTab: A Comprehensive Benchmark for Real-World TableQA with Complex Reasoning and Irregular Tables (2026.acl-long)

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Challenge: Existing benchmarks focus on well-structured tables and fail to reflect irregular structures and complex reasoning commonly encountered in real-world scenarios.
Approach: They propose a benchmark to evaluate TableQA under complex reasoning and irregular table conditions.
Outcome: The proposed framework improves generalization and realism of large language models under complex and irregular table conditions.
Improving Visual-Semantic Embedding with Adaptive Pooling and Optimization Objective (2023.eacl-main)

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Challenge: Recent VSE models combine simple pooling methods with hard triplet loss to improve performance.
Approach: They propose an adaptive pooling strategy that allows the model to learn how to aggregate features through a combination of simple pooling methods.
Outcome: The proposed strategy outperforms current state-of-the-art systems on image-to-text and text-toimage retrieval.
SSR-A: Spatial- and Semantic-Aware Instructions and Curriculum Reinforcement for Advertisement Compliant Rectification (2026.acl-industry)

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Challenge: Existing methods to fix non-compliant images suffer from over-editing, destroying original intent and perceptual similarity.
Approach: They propose a framework for the minimalist rectification of non-compliant image ads.
Outcome: The proposed framework outperforms state-of-the-art baselines in both compliance and preservation of visual and commercial consistency.
Causally Modeling the Linguistic and Social Factors that Predict Email Response (2025.naacl-long)

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Challenge: a key intent behind many emails is to get a reply from the recipient.
Approach: They propose to model the intents, expectations, and responsiveness in email exchanges by using a dataset containing 1800 emails annotated with nuanced types of intents and expectations.
Outcome: The proposed model is based on 1800 emails annotated with nuanced types of intents and expectations . it shows that social status, argumentation, and strength of social connection influence email response rates .
Thinking Beyond the Local: Multi-View Instructed Adaptive Reasoning in KG-Enhanced LLMs (2026.findings-eacl)

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Challenge: Existing methods for large language models adopt query-driven iterative reasoning from a local perspective, limiting efficiency and accuracy for complex multi-hop tasks.
Approach: They propose a multi-view instructed adaptive reasoning of LLM on Knowledge Graphs that allows LLMs to plan, evaluate, and adapt reasoning paths from a global perspective.
Outcome: The proposed model overcomes the limitations of local exploration by enabling LLMs to plan, evaluate, and adapt reasoning paths from a global perspective.
Divide-Then-Align: Honest Alignment based on the Knowledge Boundary of RAG (2025.acl-long)

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Challenge: Large language models (LLMs) augmented with retrieval systems have significantly advanced natural language processing tasks by integrating external knowledge sources.
Approach: They propose a method that conditions large language models to generate answers even in the absence of reliable knowledge.
Outcome: The proposed approach balances accuracy with appropriate abstention, enhancing the reliability and trustworthiness of retrieval-augmented systems.
ARGUS: Policy-Adaptive Ad Governance via Evolving Reinforcement with Adversarial Umpiring (2026.acl-industry)

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Challenge: Existing regulatory policies create label inconsistencies and reasoning ambiguities in historical datasets.
Approach: They propose a policy-adaptive governance system that enables evolving reinforcement through multi-agent adversarial umpiring.
Outcome: The proposed system outperforms fine-tuning baselines on industrial and public datasets . it enables evolving reinforcement through multi-agent adversarial umpiring .
When More Thinking Hurts: Overthinking in LLM Test-Time Compute Scaling (2026.findings-acl)

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Challenge: Existing research implicitly assumes that longer thinking leads to better results . a recent study suggests that test-time compute scaling is more effective than model scaling .
Approach: They challenge the assumption that longer thinking yields better results . they show that models exhibit overthinking and marginal returns diminish at higher budgets .
Outcome: The proposed framework reduces computation significantly while maintaining comparable accuracy.
Position Paper: Data-Centric AI in the Age of Large Language Models (2024.findings-emnlp)

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Challenge: a paper proposes a data-centric perspective of AI research, focusing on large language models.
Approach: They propose a data-centric viewpoint of AI research, focusing on large language models . they propose four scenarios centered around data, including data curation, attribution, knowledge transfer .
Outcome: The proposed research focuses on large language models with data centric benchmarks . the proposed benchmarks can be used to develop new data curation methods .

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